Sara May, The Pennsylvania State University – NEPDN, Swarnalatha Moparthi, North Carolina State University – SPDN, and Samantha Fieweger, Wisconsin Department of Agriculture, Trade, and Consumer Protection - NCPDN 
The Communicator: Volume 6, Issue 2, February 2025

Contact Sara May (srm183@psu.edu), Swarnalatha Moparthi (smopart@ncsu.edu), and Samantha Fieweger (sam.fieweger@wisconsin.gov) for suggestions to include. 

Denotes publications with one or more authors who are members of NPDN.Denotes publications with one or more authors who are members of NPDN.
 

Diagnostic guides

Sunflower head rot diseases: Botrytis head rot and bacterial head rot https://doi.org/10.1094/PHP-08-24-0077-DG

Pathogens

Defining the pathobiomes associated with drippy blight in Colorado and drippy nut in California https://doi.org/10.1094/PHYTOFR-03-24-0029-R 

Methods and protocols

Optimization of amplicon-based sequencing for large-scale diagnostics of known pome viruses and viroids https://doi.org/10.1094/PHYTOFR-01-24-0003-SC 

Development of tools to detect and identify strains belonging to the Pseudomonas syringae species complex responsible for vein clearing of zucchini https://doi.org/10.1094/PHYTOFR-05-23-0062-R 

Development of a qPCR and a LAMP assay for Verticillium longisporum detection and a triplex qPCR assay for simultaneous detection of V. longisporum, Leptosphaeria biglobosa, and L. maculans from canola samples https://doi.org/10.1094/PHYTOFR-03-24-0031-R 

A molecular method to assess viability of Phytophthora in infected wood following phytosanitary heat treatment https://doi.org/10.1094/PHYTOFR-05-24-0056-R 

Towards improved nepovirus detection and identification in Xiphinema nmatodes https://doi.org/10.1094/PHYTOFR-03-24-0018-R 

Detection and characterization of potato virus Y (PVY) strains and mixed infections in San Luis Valley, Colorado https://doi.org/10.1094/PHYTOFR-03-24-0028-R 

Seedborne fungal detection differs with seed assay method, and fungal diversity and abundance are impacted by fungicide treatment, harvest timing, and storage environment https://doi.org/10.1094/PHYTOFR-06-24-0076-R 

Notable First Reports 

Herbaceous ornamentals and turfgrass:

First report of Pseudomonas amygdali causing leaf spot on Hibiscus rosa-sinensis in a greenhouse in New York State, U.S.A. https://doi.org/10.1094/PDIS-07-24-1556-PDN 

First report of Hyaloperonospora sp. causing downy mildew of stock (Matthiola incana) in Ohio https://doi.org/10.1094/PDIS-08-24-1708-PDN 

Denotes publications with one or more authors who are members of NPDN.First report of anthracnose caused by Colletotrichum sansevieriae on Dracaena trifasciata (snake plant) in Tennessee https://doi.org/10.1094/PDIS-05-24-1049-PDN 


Woody ornamentals and forests:

First report of Phytopythium vexans causing root rot on tulip poplar in Tennessee and the United States https://doi.org/10.1094/PDIS-11-24-2343-PDN 

First report of Xylella fastidiosa subsp. multiplex infecting southern shagbark hickory (Carya carolinae-septentrionalis) in Georgia, USA https://doi.org/10.1094/PDIS-09-24-1990-PDN 

First report of Phytopythium vexans causing root rot of incense cedar in Tennessee and the United States https://doi.org/10.1094/PDIS-11-24-2342-PDN 


Vegetables, herbs and table beet: 

Denotes publications with one or more authors who are members of NPDN.First report of bacterial wilt of ginger caused by Ralstonia pseudosolanacearum in the continental United States https://doi.org/10.1094/PDIS-11-24-2402-PDN 


Tree fruit and small fruit: berries, nuts, stone and pome fruit:

Denotes publications with one or more authors who are members of NPDN.First report of postharvest fruit rot on passion fruit (Passiflora edulis) caused by Lasiodiplodia theobromae in the U.S.A. https://doi.org/10.1094/PDIS-09-24-1968-PDN 

First report of Neofusicoccum mediterraneum causing persimmon (Diospyros kaki) branch and twig canker in California https://doi.org/10.1094/PDIS-06-24-1298-PDN 


Field crops, cannabis, sugar beet, potato, sunflower: 

First report of Pantoea ananatis causing bacterial leaf and panicle blight of rice in Louisiana, USA https://doi.org/10.1094/PDIS-08-24-1731-PDN 

 

Peer review highlights

The bacterial and viral communities associated with onion bacterial bulb rot 
https://doi.org/10.1094/PBIOMES-11-23-0121-R

Tar spot of maize in the Americas is caused by a complex of closely related Phyllachora species which vary in their host and geographic range 
https://doi.org/10.22541/au.170669802.27673013/v1

An emerging fungal disease is spreading across the globe and affecting the blueberry industry
https://doi.org/10.1111/nph.20351

Phytophthora species and their associations with chaparral and oak woodland vegetation in Southern California
https://doi.org/10.3390/jof11010033

Optical density assay to determine the sensitivity of Globisporangium and Pythium isolates to mefenoxam
https://doi.org/10.1094/PHYTOFR-09-24-0105-FI

Mycovirome of Diaporthe helianthi and D. gulyae, causal agents of Phomopsis stem canker of sunflower (Helianthus annuus L.) 
https://doi.org/10.1016/j.virusres.2024.199521

Sensitivity to the demethylation inhibitor difenoconazole among baseline populations of various Penicillium spp. causing blue mold of apples and pears
https://doi.org/10.3390/jof11010061

A bioassay that yields quantifiable symptoms of cucurbit yellow vine disease caused by Serratia marcescens
https://doi.org/10.1094/PDIS-07-24-1401-RE 

Evidence of rapid infection of four sweetpotato potyviruses in a commercial field in California
https://doi.org/10.1094/PDIS-06-24-1304-SC 

 

Extension 

The emergence of Fusarium oxysporum f. sp. apii race 4 causing Fusarium wilt on celery in south Florida
https://doi.org/10.32473/edis-pp381-2024

Field guide to hemp (Cannabis sativa) diseases.
DOI: https://doi.org/10.32473/edis-pp379-2024

Citrus canker and citrus leprosis fruit symptom comparison. 
https://doi.org/10.32473/edis-PP372-2024 

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